Front and Rear Spring selection help?

All, I have a 2006 access cab 4wd that I'm looking to replace the front and rear springs on it. I have Bilstein 5100's for it and intend to put those on but need help with spring selection. I'd like to keep the truck close to stock height. I primarily use the truck as a daily driver but also use it to tow my racecar and trailer(3800lbs total). I also put my motorcycle in the bed too. My thought was to get the Northwest Off-road stock height springs but I'm not sure which springs/rates would be appropriate for the front? As I understand it, the northwest off-road spring will give me a .750" lift in the rear and the 5100's have adjustable lower spring perches so I can dial out some rake with preload but I don't want to make the front suspension harsh which can be a side effect of adding preload.
Any comments, suggestions are welcome and appreciated.

Thanks in advance, James